An anonymous reader writes "A study done by a Hungarian physicist found that of the billions of websites and over a trillion objects on the web, any given two are separated by no more than 19 clicks. 'Distributed across the entire web, though, are a minority of pages—search engines, indexes and aggregators—that are very highly connected and can be used to move from area of the web to another. These nodes serve as the "Kevin Bacons" of the web, allowing users to navigate from most areas to most others in less than 19 clicks. Barabási credits this "small world" of the web to human nature—the fact that we tend to group into communities, whether in real life or the virtual world. The pages of the web aren't linked randomly, he says: They're organized in an interconnected hierarchy of organizational themes, including region, country and subject area. Interestingly, this means that no matter how large the web grows, the same interconnectedness will rule.'"

New submitter jyujin writes "Ever wonder how long your SSD will last? It's funny how bad people are at estimating just how long '100,000 writes' are going to take when spread over a device that spans several thousand of those blocks over several gigabytes of memory. It obviously gets far worse with newer flash memory that is able to withstand a whopping million writes per cell. So yeah, let's crunch some numbers and fix that misconception. Spoiler: even at the maximum SATA 3.0 link speeds, you'd still find yourself waiting several months or even years for that SSD to start dying on you."

toygeek writes "Which is cheaper: Running a server from home, or renting a VPS (Virtual Private Server)? We're trying to pinch pennies where we can, and my son Derrick suggested upgrading an extra PC we have and running his Minecraft server at home. Would it save enough money to be worth it? I wanted to share the results of my analysis with my Slashdot brethren." The upshot in this case? "Overall it is VERY cost effective for us to run the home server."

First time accepted submitter Ben Rooney writes "Children in the Baltic state of Estonia will learn statistics based less on computation and doing math by hand and more on framing and interpreting problems, and thinking about validation and strategy. From the article: 'Jon McLoone is Content Director for computerbasedmath.org, a project to redefine school math education assuming the use of computers. The company announced a deal Monday with the Estonian Education ministry to trial a self-contained statistics program replacing the more traditional curriculum. “We are re-thinking computer education with the assumption that computers are the tools for computation,” said Mr. McLoone. “Schools are still focused on teaching hand calculating. Computation used to be the bottleneck. The hard part was solving the equations, so that was the skill you had to teach. These days that is the bit that computers can do. What computers can’t do is set up the problem, interpret the problem, think about validation and strategy. That is what we should be teaching and spending less time teaching children to be poor computers rather than good mathematicians.”'"

Jon Brodkin writes "I’ve been a longtime fan of Brain Age. Mixed in among the standard-issue kill-everything-you-see/race/sports types of games that dominate gaming, Brain Age on the Nintendo DS always provided something unique, fun, and mentally stimulating. Doing math problems, counting syllables, recognizing patterns, and memorizing stuff was far more enjoyable than anyone would have expected in Brain Age: Train Your Brain in Minutes a Day, the game that kicked off the series seven years ago. Based on the research of neuroscientist Ryuta Kawashima, the exercises are designed to improve brain function—or at least give players the illusion that they’re getting smarter. Nintendo developed several sequels and spinoffs for the DS after that first game, and now a Nintendo 3DS-exclusive entry is here with Brain Age: Concentration Training, released as a download and physical media this past weekend for $30. Some improvements in gameplay are readily apparent. Handwriting recognition is significantly better. You play the game by holding the 3DS upright, rather than sideways like a book, and it works so well I wonder why previous Brain Age games used the wacky book-like layout at all." Read below to see what Jon thinks of the 3DS-exclusive version.

First time accepted submitter LiteWait writes "My son is heading off to college next year and although he is bright kid with a great background in math and science, he has indicated that he'd like learn some introductory programming skills this summer. The courses at the local universities are pretty sparse and most of the CS101-type courses I've seen offered are too general to meet his needs. Even though he is a self-starter I think he would benefit from actual courses/code camps/etc rather than just slogging through online samples and tutorials. I'd like some advice on possible options for code camps, online courses, or developer training."

We've talked in the past about what kind of questions should be asked of potential developer hires, and how being honest in exit interviews probably isn't worth the potential damage to your career. We're also familiar with the tricky questions some interviewers like to throw at people to test their thinking skills, and the questionable merits of gauging somebody's skillset through a pointlessly obtuse math problem. But there are also shady employers who conduct interviews to try to mine your knowledge and experience to find free solutions to their current problems. An actual job may or may not be on the table, but if they can get what they need from you before hiring, then at the very least your bargaining position will have gotten worse. Have you dealt with situations like this in the past? Since you can't know for sure the interviewer's intentions, it's tough to provide an answer demonstrating your abilities without solving their problem. "Before asking about the fixes they’ve tried, start by acknowledging the depth of the problem and find out whether the manager has the resources to solve it. Then, just like a consultant, use their answers to highlight your experience and explain the approach you’d take." You could also try explaining how you've solved similar problems, which won't necessarily help them, but will demonstrate your value. Of course, one of the biggest challenges is determining when somebody is getting a little too specific with their interview questions. What red flags should people keep an eye out for?

An anonymous reader writes with news from Mersenne.org, home of the Great Internet Mersenne Prime Search: "On January 25th at 23:30:26 UTC, the largest known prime number, 257,885,161-1, was discovered on GIMPS volunteer Curtis Cooper's computer. The new prime number, 2 multiplied by itself 57,885,161 times, less one, has 17,425,170 digits. With 360,000 CPUs peaking at 150 trillion calculations per second, GIMPS — now in its 17th year — is the longest continuously-running global 'grassroots supercomputing' project in Internet history."

First time accepted submitter ras writes "The Reserve Bank of Australia did some investigation into the accuracy of their economic predictions — the ones they use to run the country — with less than flattering results. '70 per cent of the RBA's forecasts for underlying inflation for the year ahead were close to the mark, but its predictions of economic growth were less accurate, and its unemployment rate estimates no better than [chance] ... The Reserve Bank employs numbers of people on very high pay and what they're admitting now is that their — all of this so-called science — has produced nothing more than what a roll of the dice could produce.'"

Nerval's Lobster writes "Whatever your actual feelings about football and this weekend's Super Bowl, you have to admire Wolfram Alpha's willingness to crunch any dataset and see what it can find. The self-billed 'computational knowledge engine' has analyzed the historical data for both teams involved in this Sunday's Super Bowl XLVII. Its conclusion? The San Francisco 49ers and Baltimore Ravens are 'annoyingly similar' when it comes to numbers, although some players stand out as potential game changers — if the math plays out right."

djl4570 writes "xkcd's 'What If' series consists of humorous takes on highly implausible but oddly interesting hypothetical physics questions, like how to cook a steak with heat from atmospheric re-entry. The most recent entry dealt with flying a Cessna on other planets and moons in the solar system. Mars: 'The tricky thing is that with so little atmosphere, to get any lift, you have to go fast. You need to approach Mach 1 just to get off the ground, and once you get moving, you have so much inertia that it’s hard to change course—if you turn, your plane rotates, but keeps moving in the original direction.' Venus: 'Unfortunately, X-Plane is not capable of simulating the hellish environment near the surface of Venus. But physics calculations give us an idea of what flight there would be like. The upshot is: Your plane would fly pretty well, except it would be on fire the whole time, and then it would stop flying, and then stop being a plane.' There are also a bunch of illustrations for flightpaths on various moons (crashpaths might be more apt), which drew the attention of physics professor Rhett Allain, who explained the math in further detail and provided more accurate paths."

An anonymous reader writes "Since the 1960s until the present day, missile defense has been a hot topic. Ronald Reagan popularized the concept with his 'Star Wars' multi-billion dollar plan to use lasers and various technologies to destroy incoming Soviet warheads. Today, America has a sizable sea-based system, dubbed AEGIS, that has been deployed to defend against rogue states missiles, both conventional and nuclear. However, there is one thing missile defense can't beat: simple math. 'Think about it — could we someday see a scenario where American forces at sea with a fixed amount of defensive countermeasures face an enemy with large numbers of cruise and ballistic weapons that have the potential to simply overwhelm them? Could a potential adversary fire off older weapons that are not as accurate (PDF), causing a defensive response that exhausts all available missile interceptors so more advanced weapons with better accuracy can deliver the crushing blow? Simply put: does math win?'"

coondoggie writes "Stanford researchers said this week they had used a supercomputer with 1,572,864 compute cores to predict the noise generated by a supersonic jet engine. 'Computational fluid dynamics simulations test all aspects of a supercomputer. The waves propagating throughout the simulation require a carefully orchestrated balance between computation, memory and communication. Supercomputers like Sequoia divvy up the complex math into smaller parts so they can be computed simultaneously. The more cores you have, the faster and more complex the calculations can be. And yet, despite the additional computing horsepower, the difficulty of the calculations only becomes more challenging with more cores. At the one-million-core level, previously innocuous parts of the computer code can suddenly become bottlenecks.'"

chicksdaddy writes "Google cemented its reputation as the squarest company around Monday (pun intended), offering prizes totaling Pi Million Dollars — that's right: $3.14159 million greenbacks — in its third annual Pwnium hacking contest, to be held at the CanSecWest conference on March 7 in Vancouver, British Columbia. Google will pay $110,000 for a browser or system level compromise delivered via a web page to a Chrome user in guest mode or logged in. The company will pay $150,000 for any compromise that delivers 'device persistence' delivered via a web page, the company announced on the chromium blog. 'We believe these larger rewards reflect the additional challenge involved with tackling the security defenses of Chrome OS, compared to traditional operating systems,' wrote Chris Evans of Google's Security Team."

Frequent contributor Bennett Haselton writes "With the announcement of Verizon's "six strikes plan" for movie pirates (which includes reporting users to the RIAA and MPAA), and content companies continuing to sue users en masse for peer-to-peer downloads, I think it's inevitable that we'll see the rise of p2p software that proxifies your downloads through other users. In this model, you would not only download content from other users, but you also use other users' machines as anonymizing proxies for the downloads, which would make it impossible for third parties to identify the source or destination of the file transfer. This would hopefully put an end to the era of movie studios subpoenaing ISPs for the identities of end users and taking those users to court." Read below for the rest of Bennett's thoughts.

ananyo writes "Mathematicians plan to launch a series of free open-access journals that will host their peer-reviewed articles on the preprint server arXiv. The project was publicly revealed in a blog post by Tim Gowers, a Fields Medal winner and mathematician at the University of Cambridge, UK. The initiative, called the Episciences Project, hopes to show that researchers can organize the peer review and publication of their work at minimal cost, without involving commercial publishers. 'It’s a global vision of how the research community should work: we want to offer an alternative to traditional mathematics journals,' says Jean-Pierre Demailly, a mathematician at the University of Grenoble, France, who is a leader in the effort. Backed by funding from the French government, the initiative may launch as early as April, he says."

DavidHumus writes "The much-publicized international rankings of student test scores — PISA — rank the U.S. lower than it ought to be for two reasons: a sampling bias that includes a higher proportion of lower socio-economic classes from the U.S. than are in the general population and a higher proportion of of U.S. students than non-U.S. who are in the lower socio-economic classes. If one were to rank comparable classes between the U.S. and the rest of the world, U.S. scores would rise to 4th from 14th in reading (PDF) and to 10th from 25th in math."

innocent_white_lamb writes "A researcher says that some letters are over valued and some are under-valued in Scrabble, due to recent changes to the lists of allowable words. Z and X are now much easier to play and should be worth less, while U, M and G should be worth more than they are now. Joshua Lewis wrote a program to re-calculate the value of each letter to better reflect the current usage. The co-president of the North American Scrabble Players Association says that he often hears criticism of Scrabble's scoring system, but any change would bring about 'catastrophic outrage'. A spokesman for Mattel says that they have no plans to change the game."

SchrodingerZ writes "The Viktor Rydberg school in Stockholm, Sweden, has announced that they have included Minecraft into the curriculum for their 13-year-old students. The program is not meant to teach children about math or language, but rather as a tool to inspire creativity in the classroom. 'They learn about city planning, environmental issues, getting things done, and even how to plan for the future,' Viktor Rydberg teacher Monica Ekman told English-language newspaper The Local. 'It's not any different from arts or woodcraft,' she added."

zacharye writes "The Sunday evening Wall Street Journal article claiming that Apple had cut its iPhone 5 display orders drastically for the March quarter made quite a splash. The way WSJ wrote its piece seemed to support the original Nikkei claim about Apple cutting its iPhone 5 display orders in half from the originally planned order of 65 million units. This would be a massive adjustment. But Apple uses the same new display type for both iPhone 5 and the latest iPod touch. Neither WSJ nor Nikkei addressed this, however — both seemed to be referring to just iPhone 5 displays. The math just doesn't add up."